diff --git a/runtime/include/sandbox_types.h b/runtime/include/sandbox_types.h
index d4c2b04..6fab84d 100644
--- a/runtime/include/sandbox_types.h
+++ b/runtime/include/sandbox_types.h
@@ -32,7 +32,6 @@ struct sandbox_io_handle {
 struct sandbox {
 	uint64_t        id;
 	bool request_from_outside;
-	int current_func_index; /* indicate the index of next function in the chain */
 	char * previous_function_output; /* the output of the previous function */
 	ssize_t output_length; /* the length of previous_function_output */
 	ssize_t previosu_request_length; /* the length of previous request */
diff --git a/runtime/src/current_sandbox.c b/runtime/src/current_sandbox.c
index 7dcd5d5..90743ce 100644
--- a/runtime/src/current_sandbox.c
+++ b/runtime/src/current_sandbox.c
@@ -93,7 +93,6 @@ current_sandbox_start(void)
 	module_initialize_memory(current_module);
 	sandbox_setup_arguments(sandbox);
 
- 
 	/* Executing the function */
 	int32_t argument_count = module_get_argument_count(current_module);
 	current_sandbox_enable_preemption(sandbox);